高考英语-概要写作-公开课课件.pptx

1、12022-3-23阅读下面短文，根据其内容写一篇60词左右的内容概要。Feeding the worlds population is a big challenge, and it is about to get bigger. Right now, a little more than 7.3 billion people share the planet. By 2050, some scientists estimate, the worlds population may reach 9 billion. However, the changing climate will pro

2、bably make feeding this far greater number a very frightening task. That is the conclusion reached by some scientists.Just three cropswheat, rice and cornprovide more than two-thirds of the calories that people consume. Such crops, and a small number of other important crops, come from farming regio

3、ns sometimes referred to as “breadbaskets”. However, these areas often occupy a relatively small portion(部分) of the globe. Worse still, the breadbaskets are easily affected by bad weather. Events such as widespread flooding or extended heat wave can kill crops. Thats especially true if the bad weath

4、er occurs when a crop is young, fruiting or approaching harvest.Unfortunately, big crop failures in two or more breadbaskets could lead to what researchers call a “food shock”. That means an overall shortage of food would occur. Extreme food shocks used to happen every century. Or to put it another

5、way, thats only about once in very four generations of humans. However, according to studies, as the climate warms, high and low temperatures become more extreme, and by 2050, food shocks could occur about once every 30 years. In other words, a person born in the middle of the current century might

6、live through two or three extreme food shocks during their lifetime.So what can people do to help avoid food shocks? Making agriculture efficient is one choice. But one of the most effective ways to fight against food shocks might be to cut down on food waste. “If we could cut food waste in half,” s

7、aid Seth Cook, a British environmental scientist, “we could feed an extra billion people.”22022-3-233. add some transitional words to make the passage smooth. 1. Find out key information of each para. 2. Rewrite the key information Express the same meaning using your own words , phrases or structure

8、s.Concise ! 60-70 words32022-3-23Step 1: Careful reading for the key words, phrases or sentences in each paragraph Underline or circle the key informationPara. 1: Feeding the worlds population is a big challenge, and it is about to get bigger. Right now, a little more than 7.3 billion people share t

9、he planet. By 2050, some scientists estimate, the worlds population may reach 9 billion. However, the changing climate will probably make feeding this far greater number a very frightening task. That is the conclusion reached by some scientists.42022-3-23Para. 1: Feeding the worlds population is a b

10、ig challenge, and it is about to get bigger. Right now, a little more than 7.3 billion people share the planet. By 2050, some scientists estimate, the worlds population may reach 9 billion. However, the changing climate will probably make feeding this far greater number a very frightening task. That

11、 is the conclusion reached by some scientists. 52022-3-23Para. 1: Feeding the worlds population is a big challenge, and it is about to get bigger. Right now, a little more than 7.3 billion people share the planet. By 2050, some scientists estimate, the worlds population may reach 9 billion. However,

12、 the changing climate will probably make feeding this far greater number a very frightening task. That is the conclusion reached by some scientists. 62022-3-23Para. 1: Feeding the worlds population is a big challenge, and it is about to get bigger. Right now, a little more than 7.3 billion people sh

13、are the planet. By 2050, some scientists estimate, the worlds population may reach 9 billion. However, the changing climate will probably make feeding this far greater number a very frightening task. That is the conclusion reached by some scientists. 72022-3-23Para. 2: Just three cropswheat, rice an

14、d cornprovide more than two-thirds of the calories that people consume. Such crops, and a small number of other important crops, come from farming regions sometimes referred to as “breadbaskets”. However, these areas often occupy a relatively small portion(部分) of the globe. Worse still, the breadbas

15、kets are easily affected by bad weather. Events such as widespread flooding or extended heat wave can kill crops. Thats especially true if the bad weather occurs when a crop is young, fruiting or approaching harvest.82022-3-23Para. 2: Just three cropswheat, rice and cornprovide more than two-thirds

16、of the calories that people consume. Such crops, and a small number of other important crops, come from farming regions sometimes referred to as “breadbaskets”. However, these areas often occupy a relatively small portion(部分) of the globe. Worse still, the breadbaskets are easily affected by bad wea

17、ther. Events such as widespread flooding or extended heat wave can kill crops. Thats especially true if the bad weather occurs when a crop is young, fruiting or approaching harvest.92022-3-23Para. 2: Just three cropswheat, rice and cornprovide more than two-thirds of the calories that people consume

18、. Such crops, and a small number of other important crops, come from farming regions sometimes referred to as “breadbaskets”. However, these areas often occupy a relatively small portion(部分) of the globe. Worse still, the breadbaskets are easily affected by bad weather. Events such as widespread flo

19、oding or extended heat wave can kill crops. Thats especially true if the bad weather occurs when a crop is young, fruiting or approaching harvest.102022-3-23Para. 3: Unfortunately, big crop failures in two or more breadbaskets could lead to what researchers call a “food shock”. That means an overall

20、 shortage of food would occur. Extreme food shocks used to happen every century. Or to put it another way, thats only about once in very four generations of humans. However, according to studies, as the climate warms, high and low temperatures become more extreme, and by 2050, food shocks could occu

21、r about once every 30 years. In other words, a person born in the middle of the current century might live through two or three extreme food shocks during their lifetime.112022-3-23Para. 3: Unfortunately, big crop failures in two or more breadbaskets could lead to what researchers call a “food shock

22、”. That means an overall shortage of food would occur. Extreme food shocks used to happen every century. Or to put it another way, thats only about once in very four generations of humans. However, according to studies, as the climate warms, high and low temperatures become more extreme, and by 2050

23、, food shocks could occur about once every 30 years. In other words, a person born in the middle of the current century might live through two or three extreme food shocks during their lifetime.122022-3-23Para. 3: Unfortunately, big crop failures in two or more breadbaskets could lead to what resear

24、chers call a “food shock”. That means an overall shortage of food would occur. Extreme food shocks used to happen every century. Or to put it another way, thats only about once in very four generations of humans. However, according to studies, as the climate warms, high and low temperatures become m

25、ore extreme, and by 2050, food shocks could occur about once every 30 years. In other words, a person born in the middle of the current century might live through two or three extreme food shocks during their lifetime.132022-3-23Para. 4: So what can people do to help avoid food shocks? Making agricu

26、lture efficient is one choice. But one of the most effective ways to fight against food shocks might be to cut down on food waste. “If we could cut food waste in half,” said Seth Cook, a British environmental scientist, “we could feed an extra billion people.”142022-3-23Para. 4: So what can people d

27、o to help avoid food shocks? Making agriculture efficient is one choice. But one of the most effective ways to fight against food shocks might be to cut down on food waste. “If we could cut food waste in half,” said Seth Cook, a British environmental scientist, “we could feed an extra billion people

28、.”152022-3-23Para. 4: So what can people do to help avoid food shocks? Making agriculture efficient is one choice. But one of the most effective ways to fight against food shocks might be to cut down on food waste. “If we could cut food waste in half,” said Seth Cook, a British environmental scienti

29、st, “we could feed an extra billion people.”162022-3-23Step 2: Rewrite the key information in our own words Tip 1: Rewrite at the sentence level Tip 2: Rewrite at the word level172022-3-23Para. 1: Feeding the worlds population is a big challenge, and it is about to get bigger._ (change the compound

30、sentence并列句 into one simple sentence简单句 )_ (change the subject) Feeding the worlds population is a _ _ _ challenge._ is a bigger and bigger challenge to feed the worlds population.bigger andbiggerIt182022-3-23_ (change the word “worlds”)_ (change the phrase “a bigger and bigger challenge”) Para. 1:

31、It is a bigger and bigger challenge to feed the worlds population.It is a bigger and bigger challenge to feed theglobal population.It is _ _ _ _ to feed theglobal population.challenging more and more 192022-3-23Para. 1: It is more and more challenging to feed the _ global population. (add an adjecti

32、ve)Para. 1: Feeding the worlds population is a big challenge, and it is about to get bigger. Right now, a little more than 7.3 billion people share the planet. By 2050, some scientists estimate, the worlds population may reach 9 billion. However, the changing climate will probably make feeding this

33、far greater number a very frightening task. That is the conclusion reached by some scientists.increasinggrowing202022-3-23Para. 2: crops, breadbaskets, These areas often occupy a relatively small portion of the globe._ (simplify the sentence)_ (use “many crops” as the subject) Breadbaskets are often

34、 _.Many crops _ _ _ on _ breadbaskets.limitedare often grown limited 212022-3-23Para. 2: The breadbaskets are easily affected by bad weather._ (change the word “affect”) Breadbaskets are easily _ /_by bad weather.Many crops are often grown on limited breadbaskets. (combine the two sentences)Para. 2:

35、 Many crops are often grown on limited breadbaskets _ are easily impacted by bad weather.that/ whichinfluenced impacted222022-3-23Para. 3: big crop failures, could lead to, a “food shock” That means an overall shortage of food would occur._ (put the key phrases into one sentence)_ (combine the two s

36、entences) Big crop failures could lead to a “food shock”.Big crop failures could lead to a “food shock” _ means an overall shortage of food.that/whichBig crop failures could lead to an overall shortage of food, _ a “food shock”.called232022-3-23Para. 3:Big crop failures could lead to an overall shor

37、tage of food, called a “food shock”._ (change the phrase “lead to”)Big crop failures could cause an overall shortageof food, called a “food shock”.result in /contribute toaccount for/242022-3-23Para. 3: Unfortunately, big crop failures in two or more breadbaskets could lead to what researchers call

38、a “food shock”. That means an overall shortage of food would occur. Extreme food shocks used to happen every century. Or to put it another way, thats only about once in very four generations of humans. However, according to studies, as the climate warms, high and low temperatures become more extreme

39、, and by 2050, food shocks could occur about once every 30 years. In other words, a person born in the middle of the current century might live through two or three extreme food shocks during their lifetime.Para. 3:Food shocks could occur more _in the future. (use one adverb)frequently/often252022-3

40、-23Para. 3:Big crop failures could cause an overall shortageof food, called a “food shock”.Food shocks could occur more frequently in the future. (combine the two sentences)Big crop failures could cause an overall shortage of food, called a “food shock”, _ could occur more frequently in the future.w

41、hich262022-3-23Para. 4:Making agriculture efficient is one choice. But one of the most effective ways to fight against food shocks might be to cut down on food waste. _ (change the subject of the second sentence)Cutting down on food waste is one of the most effective ways to fight against food shock

42、s.(change the phrase “cut down on”) Reducing food waste272022-3-23Para. 4:Making agriculture efficient is one choice.Reducing food waste is one of the most effective ways to fight against food shocks. So what can people do to help avoid food shocks? People can avoid food shocks by _ _ and _ _ _.maki

43、ngagriculture efficientreducing food waste282022-3-23Para. 4People can avoid food shocks by making agriculture efficient and reducing food waste._ (change the active voice into passive voice) (change the word “avoid”)Food shocks can be avoided by making agriculture efficient and reducing food waste.

44、prevented292022-3-23Step 3: add some transitional words to make the passage smooth.It is more and more challenging to feed the growing global population. _ many crops are often grown on limited breadbaskets which are easily impacted by bad weather. _ big crop failures could cause an overall shortage

45、 of food, called a “food shock”, which could occur more frequently in the future. _ food shocks can be prevented by making agriculture efficient and reducing food waste.For one thing, For another, One reason is that Another reason is that However, 302022-3-23It is more and more challenging to feed t

46、he growing global population. For one thing, many crops are often grown on limited breadbaskets which are easily impacted by bad weather. For another, big crop failures could cause an overall shortage of food, called a “food shock”, which could occur more frequently in the future. However, food shocks can be prevented by making agriculture efficient and reducing food waste. (68 words)312022-3-23